Circular patio

I have a small 12’ circular patio and would love to build a matching pergola above it. Has anyone ever seen circular pergola pictures or have any ideas.Last time I built one it was square so that was easy, this is much more challenging.

Thanks for the tips. I did what drc726 suggested, so easy why didn't I think of that? Found one, I think I can build, called Grange carousel on the Garden chick web site.
Scotsgran, thanks for the tip on edecks, they are amazing designs, but did you see the prices? Unfortunatly, they are too difficult to copy, because of the amount of bent wood in the designs.